File:Pennsylvania counties map.png|thumb|right|300px|Pennsylvania counties (clickable map)

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Adams County, Pennsylvania

Adams County is a county in the U.S. state of Pennsylvania. As of the 2010 census, the population was 101,407. It was created on January 22, 1800, from part of York County and named in honor of the second President of the United States, John Adams...

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Allegheny County, Pennsylvania

Allegheny County is a county in the southwestern part of the U.S. state of Pennsylvania. As of the 2010 census, the population was 1,223,348; making it the second most populous county in Pennsylvania, following Philadelphia County. The county seat is Pittsburgh...

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Armstrong County, Pennsylvania

Armstrong County is a county located in the U.S. state of Pennsylvania. As of the 2010 census, the population was 68,941. It is located northeast of Pittsburgh and Allegheny County. Armstrong County was added to the Pittsburgh Metropolitan Statistical Area in 2003.The county seat is Kittanning...

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Beaver County, Pennsylvania

-Demographics:As of the census of 2000, there were 181,412 people, 72,576 households, and 50,512 families residing in the county. The population density was 418 people per square mile . There were 77,765 housing units at an average density of 179 per square mile...

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Bedford County, Pennsylvania

Bedford County is a county located in the U.S. state of Pennsylvania. As of the 2010 census, the population was 49,762. The county seat is Bedford. It is part of the Altoona, Pennsylvania, Metropolitan Statistical Area.- History :...

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Berks County, Pennsylvania

-Demographics:As of the census of 2000, there were 373,638 people, 141,570 households, and 98,532 families residing in the county. The population density was 435 people per square mile . There were 150,222 housing units at an average density of 175 per square mile...

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Blair County, Pennsylvania

-Significant Topographic Features:*Brush Mountain*Logan Valley*Morrison Cove*Tussey Mountain-Demographics:As of the census of 2000, there were 129,144 people, 51,518 households, and 34,877 families residing in the county. The population density was 246 people per square mile . There were 55,061...

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Bradford County, Pennsylvania

-Demographics:As of the census of 2000, there were 62,761 people, 24,453 households, and 17,312 families residing in the county. The population density was 54 people per square mile . There were 28,664 housing units at an average density of 25 per square mile...

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Bucks County, Pennsylvania

- Industry and commerce :The boroughs of Bristol and Morrisville were prominent industrial centers along the Northeast Corridor during World War II. Suburban development accelerated in Lower Bucks in the 1950s with the opening of Levittown, Pennsylvania, the second such "Levittown" designed by...

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Butler County, Pennsylvania

-Demographics:As of the census of 2000, there were 174,083 people, 65,862 households, and 46,827 families residing in the county. The population density was 221 people per square mile . There were 69,868 housing units at an average density of 89 per square mile...

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Cameron County, Pennsylvania

As of the census of 2000, there were 5,974 people, 2,465 households, and 1,624 families residing in the county. The population density was 15 people per square mile . There were 4,592 housing units at an average density of 12 per square mile...

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Cambria County, Pennsylvania

Cambria County is a county located in the U.S. state of Pennsylvania. It comprises the Johnstown, Pennsylvania, Metropolitan Statistical Area. As of 2010, the population was 143,679....

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Carbon County, Pennsylvania

As of the census of 2000, there were 58,802 people, 23,701 households, and 16,424 families residing in the county. The population density was 154 people per square mile . There were 30,492 housing units at an average density of 80 per square mile...

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Clarion County, Pennsylvania

As of the census of 2000, there were 41,765 people, 16,052 households, and 10,738 families residing in the county. The population density was 69 people per square mile . There were 19,426 housing units at an average density of 32 per square mile...

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Chester County, Pennsylvania

-State parks:*French Creek State Park*Marsh Creek State Park*White Clay Creek Preserve-Demographics:As of the 2010 census, the county was 85.5% White, 6.1% Black or African American, 0.2% Native American or Alaskan Native, 3.9% Asian, 0.0% Native Hawaiian, 1.8% were two or more races, and 2.4% were...

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Clearfield County, Pennsylvania

Clearfield County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 81,642.Clearfield County was created on March 26, 1804, from parts of Huntingdon and Lycoming Counties but was administered as part of Centre County until 1812...

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Clinton County, Pennsylvania

As of the census of 2000, there were 37,914 people, 14,773 households, and 9,927 families residing in the county. The population density was 43 people per square mile . There were 18,166 housing units at an average density of 20 per square mile...

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Columbia County, Pennsylvania

As of the census of 2000, there were 64,151 people, 24,915 households, and 16,568 families residing in the county. The population density was 132 people per square mile . There were 27,733 housing units at an average density of 57 per square mile...

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Crawford County, Pennsylvania

Crawford County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 88,765.Crawford County was created on March 12, 1800, from part of Allegheny County and named for Colonel William Crawford...

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Cumberland County, Pennsylvania

Cumberland County is a county located in the U.S. state of Pennsylvania and is one of three counties comprising the Harrisburg–Carlisle Metropolitan Statistical Area. As of 2010, the population was 235,406.-History:...

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Dauphin County, Pennsylvania

Dauphin County is a county in the U.S. state of Pennsylvania and is one of the three counties comprising the Harrisburg–Carlisle Metropolitan Statistical Area. As of 2010 census, the population was 268,100. The county includes the city of Harrisburg, which has served as the state capital...

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Delaware County, Pennsylvania

Delaware County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 558,979, making it Pennsylvania's fifth most populous county, behind Philadelphia, Allegheny, Montgomery, and Bucks counties....

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Elk County, Pennsylvania

Elk County is a county located in the U.S. state of Pennsylvania. As of the 2010 census, the population was 31,946.Elk County was created on April 18, 1843, from parts of Jefferson, Clearfield and McKean Counties, and is named for the Eastern elk that historically inhabited the region. Its county...

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Erie County, Pennsylvania

Erie County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 280,566. Its county seat is the City of Erie.- Geography :...

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Fayette County, Pennsylvania

Fayette County is a county located in the U.S. state of Pennsylvania. As of the2010 census, the population was 136,606. The county is part of the Pittsburgh Metropolitan Statistical Area....

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Forest County, Pennsylvania

Forest County is a county located in the U.S. state of Pennsylvania. As of 2010, the population is 7,716. Forest County is famous as a rural retreat. Nearly 75% of all dwellings in the county are second or vacation homes . Forest County does not have a single traffic light, the only county in the...

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Franklin County, Pennsylvania

As of the census of 2000, there were 129,313 people, 50,633 households, and 36,405 families residing in the county. The population density was 168 people per square mile . There were 53,803 housing units at an average density of 70 per square mile...

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Fulton County, Pennsylvania

Fulton County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 14,845.Fulton County was created on April 19, 1850, from part of Bedford County and named for inventor Robert Fulton.Its county seat is McConnellsburg....

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Greene County, Pennsylvania

-Demographics:As of the census of 2000, there were 40,672 people, 15,060 households, and 10,587 families residing in the county. The population density was 71 people per square mile . There were 16,678 housing units at an average density of 29 per square mile...

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Huntingdon County, Pennsylvania

Huntingdon County is a county located in the U.S. state of Pennsylvania. In 2010, its population was 45,913.Huntingdon County was created on September 20, 1787, from part of Bedford County. Its county seat is Huntingdon.-Geography:According to the U.S...

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Indiana County, Pennsylvania

-Government and politics:As of November 2008, there are 58,077 registered voters in Indiana County .* Democratic: 26,653 * Republican: 24,159 * Other Parties: 7,265 -County commissioners:*Rodney Ruddock, Chairman, Republican...

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Jefferson County, Pennsylvania

Jefferson County is a county located in the U.S. state of Pennsylvania. In 2010, its population was 45,200. It was established on March 26, 1804, from part of Lycoming County and named for then-President Thomas Jefferson. Its county seat is Brookville...

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Juniata County, Pennsylvania

Juniata County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 24,636. Juniata County was created on March 2, 1831, from part of Mifflin County and named for the Juniata River. Its county seat is Mifflintown....

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Lackawanna County, Pennsylvania

As of the census of 2000, there were 213,295 people, 86,218 households, and 55,783 families residing in the county. The population density was 465 people per square mile . There were 95,362 housing units at an average density of 208 per square mile...

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Lancaster County, Pennsylvania

Lancaster County, known as the Garden Spot of America or Pennsylvania Dutch Country, is a county located in the southeastern part of the Commonwealth of Pennsylvania, in the United States. As of 2010 the population was 519,445. Lancaster County forms the Lancaster Metropolitan Statistical Area, the...

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Lawrence County, Pennsylvania

Lawrence County is a county located in the U.S. state of Pennsylvania. In 2010, its population was 91,108. The county was added to the Pittsburgh Metropolitan Statistical Area in 2003. The county seat is New Castle....

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Lebanon County, Pennsylvania

As of the census of 2000, there were 120,327 people and 32,771 families residing in the county. The population density was 332 people per square mile . There were 49,320 housing units at an average density of 136 per square mile...

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Lehigh County, Pennsylvania

-Climate:Most of the county's climate is considered to fall in the humid continental climate zone. Summers are typically hot and muggy, fall and spring are generally mild, and winter is cold. Precipitation is almost uniformly distributed throughout the year....

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Luzerne County, Pennsylvania

- Demographics :As of the 2010 census, the county was 90.7% White, 3.4% Black or African American, 0.2% Native American, 1.0% Asian, 3.3% were of some other race, and 1.5% were two or more races. 6.7% of the population was of Hispanic or Latino ancestry...

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Lycoming County, Pennsylvania

-Appalachian Mountains and Allegheny Plateau:Lycoming County is divided between the Appalachian Mountains in the south, the dissected Allegheny Plateau in the north and east, and the valley of the West Branch Susquehanna River between these.-West Branch Susquehanna River:The West Branch of the...

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McKean County, Pennsylvania

As of the census of 2000, there were 45,936 people, 18,024 households, and 12,094 families residing in the county. The population density was 47 people per square mile . There were 21,644 housing units at an average density of 22 per square mile...

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Mercer County, Pennsylvania

Mercer County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 116,638. Its county seat is Mercer; Sharon is its largest city....

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Mifflin County, Pennsylvania

Mifflin County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 46,682. Its county seat is Lewistown. It is named after Thomas Mifflin, the first Governor of Pennsylvania.-Geography:...

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Monroe County, Pennsylvania

-National protected areas:* Delaware Water Gap National Recreation Area * Middle Delaware National Scenic River -Demographics:As of the census of 2010, there are 176,567 people, 49,454 households, and 36,447 families residing in the county. The population density was 228 people per square mile...

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Montgomery County, Pennsylvania

Montgomery County is a county located in the U.S. state of Pennsylvania, in the United States. As of 2010, the population was 799,874, making it the third most populous county in Pennsylvania . The county seat is Norristown.The county was created on September 10, 1784, out of land originally part...

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Montour County, Pennsylvania

Montour County is located in the U.S. state of Pennsylvania. In 2010, the county's population was 18,267. Its county seat is Danville. It is named for Andrew Montour, a prominent métis interpreter who served with George Washington during the French and Indian War. The county is part of the...

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Northampton County, Pennsylvania

As of the 2010 census, the county was 86.3% White, 5.0% Black or African American, 0.2% Native American or Alaskan Native, 2.4% Asian, 0.0% Native Hawaiian, 2.2% were two or more races, and 3.8% were some other race. 10.5% of the population were of Hispanic or Latino ancestry.As of the census of...

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Northumberland County, Pennsylvania

There were 38,835 households out of which 27.30% had children under the age of 18 living with them, 52.40% were married couples living together, 9.60% had a female householder with no husband present, and 34.10% were non-families. 30.20% of all households were made up of individuals and 15.50% had...

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Perry County, Pennsylvania

As of the census of 2000, there were 43,602 people, 16,695 households, and 12,320 families residing in the county. The population density was 79 people per square mile . There were 18,941 housing units at an average density of 34 per square mile...

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Philadelphia County, Pennsylvania

-History:Tribes of Lenape were the first known occupants in the area which became Philadelphia County. The first European settlers were Swedes and Finns who arrived in 1638. The Netherlands seized the area in 1655, but permanently lost control to England in 1674...

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Pike County, Pennsylvania

-National protected areas:* Delaware Water Gap National Recreation Area * Middle Delaware National Scenic River * Upper Delaware Scenic and Recreational River -Demographics:...

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Potter County, Pennsylvania

Potter County is a county located in the U.S. state of Pennsylvania. It is in the Allegheny Plateau region. As of 2010, the population was 17,457. Its county seat is Coudersport. Potter County was named after James Potter, who was a general from Pennsylvania in the Continental Army during the...

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Schuylkill County, Pennsylvania

-Notable people:*Boxing heavyweight great Muhammad Ali had his training camp in Deer Lake.*Charles Justin Bailey, commanding general of the 81st Division in World War I, was born in Tamaqua on June 21, 1859....

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Snyder County, Pennsylvania

Snyder County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 39,702. Snyder County was formed in 1855 from parts of Union County...

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Somerset County, Pennsylvania

Somerset County is a county located in the state of Pennsylvania. As of 2010, the population was 77,742. Somerset County was created on April 17, 1795, from part of Bedford County and named for Somerset, United Kingdom. Its county seat is Somerset. It is part of the Johnstown, Pennsylvania,...

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Sullivan County, Pennsylvania

Sullivan County is a county located in the U.S. state of Pennsylvania. As of 2010, the population is 6,428. Sullivan County was created on March 15, 1847, from part of Lycoming County and named for Charles Sullivan, leader of the Pennsylvania Senate...

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Tioga County, Pennsylvania

Tioga County is a county located in the U.S. state of Pennsylvania. As of the 2010 census, the population was 41,981. Tioga County was created on March 26, 1804, from part of Lycoming County and named for the Tioga River. Its county seat is Wellsboro....

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Union County, Pennsylvania

-Demographics:As of the census of 2000, there were 41,624 people, 13,178 households, and 9,211 families residing in the county. The population density was 131 people per square mile . There were 14,684 housing units at an average density of 46 per square mile...

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Venango County, Pennsylvania

Venango County is a county located in the U.S. state of Pennsylvania. As of the 2010 census, the population was 54,984. Its county seat is Franklin.-History:Venango County was created on March 12, 1800 from parts of Allegheny and Lycoming Counties...

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Warren County, Pennsylvania

Warren County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 41,815. It was formed in 1800 from parts of Allegheny and Lycoming counties; attached to Crawford County until 1805 and then to Venango County until Warren was formally organized in 1819. Its county...

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Washington County, Pennsylvania

-Government and politics:As of November 2008, there are 152,534 registered voters in Washington County .* Democratic: 89,027 * Republican: 49,025 * Other Parties: 14,482...

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Wayne County, Pennsylvania

As of the census of 2000, there were 47,722 people, 18,350 households, and 12,936 families residing in the county. The population density was 65 people per square mile . There were 30,593 housing units at an average density of 42 per square mile...

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Westmoreland County, Pennsylvania

-Demographics:As of the census of 2000, there were 369,993 people, 149,813 households, and 104,569 families residing in the county. The population density was 361 people per square mile . There were 161,058 housing units at an average density of 157 per square mile...

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Wyoming County, Pennsylvania

Wyoming County is a county located in the U.S. state of Pennsylvania. It was created in 1842 from part of Luzerne County. Its county seat is Tunkhannock.-Geography:According to the U.S...

poly 516 491 516 472 521 467 519 463 518 459 520 455 514 439 506 438 502 432 496 430 511 417 518 415 528 413 526 407 531 403 536 402 540 406 547 409 550 415 550 419 554 421 557 424 559 430 574 433 579 433 584 441 586 450 599 457 601 465 608 475 616 481 621 490 York County

York County, Pennsylvania

York County is a county in the U.S. state of Pennsylvania. As of 2010, the population was 434,972. It is in the Susquehanna Valley, a large fertile agricultural region in South Central Pennsylvania....

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The following is a list of the sixty-seven counties of the Commonwealth of Pennsylvania

Pennsylvania

The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...

 in the United States of America

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. The city of Philadelphia

Philadelphia, Pennsylvania

Philadelphia is the largest city in the Commonwealth of Pennsylvania and the county seat of Philadelphia County, with which it is coterminous. The city is located in the Northeastern United States along the Delaware and Schuylkill rivers. It is the fifth-most-populous city in the United States,...

 is coterminous with Philadelphia County

Philadelphia County, Pennsylvania

-History:Tribes of Lenape were the first known occupants in the area which became Philadelphia County. The first European settlers were Swedes and Finns who arrived in 1638. The Netherlands seized the area in 1655, but permanently lost control to England in 1674...

, and governmental functions have been consolidated since 1854.

FIPS code

The Federal Information Processing Standard

Federal Information Processing Standard

A Federal Information Processing Standard is a publicly announced standardization developed by the United States federal government for use in computer systems by all non-military government agencies and by government contractors, when properly invoked and tailored on a contract...

 (FIPS) code, used by the United States government to uniquely identify counties, is provided with each entry. FIPS codes are five digit numbers, for Pennsylvania the codes start with 42 and are completed with the three digit county code. The FIPS code for each county in the table links to census data for that county.

Alphabetical list

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